BlogEngine db problems

I installed blogengine on my site a few weeks ago, and we've been loving it. Until today.

I went to access my site, and saw this error:

Server Error in '/' Application.

Cannot open database "xxx" requested by the login. The login failed.
Login failed for user 'itc0832403322590'.

IF you're curious, go to www.itcamefromcanada.com to see the whole error. I'm not much of a developer, and I'm frankly not sure what to do with this. My host says it's a "blogengine" problem, so I'm
pretty much on my own. Any ideas??